David, A.Kögel, G.Sperr, P.Triftshäuser, W.2004-12-032004-12-0320012001http://hdl.handle.net/2003/75410.17877/DE290R-10626enThe American Physical SocietyPhysical Review Letters530Lifetime Measurements with a Scanning Positron Microscope10.1103/PhysRevLett.87.067402article (journal)